解析一个XML文件: XML解析器

解析一个XML文件: XML解析器

public class MainActivity extends Activity implements OnClickListener {

      private  Button  bt;

    private  SmsBean sms;

    private List<SmsBean> smsList;

      

      @Override

      protected void onCreate(Bundle savedInstanceState) {

             super.onCreate(savedInstanceState);

            setContentView(R.layout. activity_main);

            

             bt=(Button) findViewById(R.id. bt);

            

             bt.setOnClickListener( this);

            

      }

      /**

       * 解析 xml文件的方法

       * @param v

       */

      @Override

      public void onClick(View v) {

             try {

                   //创建pull解析器

                  XmlPullParser parser = Xml. newPullParser();

                  

                   //pull解析器配置

                  FileInputStream  fis= new FileInputStream(Environment.getExternalStorageDirectory().getPath()+ "/sms.xml");

                  parser.setInput(fis, "UTF-8");

                  

                   //开始解析,获事件的类型

                   int eventType = parser.getEventType();

                   while(eventType!=XmlPullParser. END_DOCUMENT){    //当事件类型不等于END_DOCUMENT时,继续解析

                        

                        String tageName=parser.getName(); //得到解析节点的名称

                        

                         switch (eventType) {

                         case XmlPullParser. START_TAG:    //当解析的事件是开始标签时

                               if( "Sms".equals(tageName)){

                                     smsList= new ArrayList<SmsBean>();

                               }

                               else if( "sms".equals(tageName)){

                                     sms= new SmsBean();

                                     sms.setName(parser.getAttributeValue(0));

                              }

                               else if( "address".equals(tageName)){

                                     sms.setStress(parser.nextText());

                              }

                               else if( "content".equals(tageName)){

                                     sms.setContent(parser.nextText());

                              }

                               else if( "tate".equals(tageName)){

                                     sms.setDate(Integer. parseInt(parser.nextText()));

                              }

                              

                              

                               break;

                         case XmlPullParser. END_TAG:

                               if( "Sms".equals(tageName)){

                                     smsList.add( sms);

                                     sms= null;

                                    

                              }

                              

                              

                               break;

                        }

                        

                        

                        

                        

                  }

                  

                   //继续往下解析

                  eventType=parser.next();

                  

                  

                  

            } catch (Exception e) {

               e.printStackTrace();

            }

            

      

             sms.toString();

            

      }

      

      

  }

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解析网络上xml文件和json文件:

public class PersonService {

      public List<Person> getPersonsByXML() throws Exception {

            URL url = new URL("http://192.168.1.100:8080/05.Web/persons.xml" );

            HttpURLConnection conn = (HttpURLConnection) url.openConnection();

            conn.setConnectTimeout(3000);

            

             int code = conn.getResponseCode();

             if (code == 200) {

                  InputStream in = conn.getInputStream();

                   return parseXML(in);

            }

             throw new RuntimeException( "网络异常: " + code);

      }

      /**

       * 解析网络上的 xml文件

       * @param in

       * @return

       * @throws Exception

       */

      private List<Person> parseXML(InputStream in) throws Exception {

            XmlPullParser parser = Xml. newPullParser();

            parser.setInput(in, "UTF-8");

            

            List<Person> list = new ArrayList<Person>();

            Person p = null;

            

             for ( int type = parser.getEventType(); type != XmlPullParser.END_DOCUMENT; type = parser.next()) {

                   if (type == XmlPullParser. START_TAG) {

                         if ( "person".equals(parser.getName())) {

                              p = new Person();

                              String id = parser.getAttributeValue(0);

                              p.setId(Integer. parseInt(id));

                              list.add(p);

                        } else if ( "name".equals(parser.getName())) {

                              String name = parser.nextText();

                              p.setName(name);

                        } else if ( "age".equals(parser.getName())) {

                              String age = parser.nextText();

                              p.setAge(Integer. parseInt(age));

                        }

                  }

            }

            

             return list;

      }

      /**

       * 解析网络上的 json文件

       * @return

       * @throws Exception

       */

      public List<Person> getPersonsByJSON() throws Exception {

            URL url = new URL("http://192.168.1.100:8080/05.Web/persons.js" );

            HttpURLConnection conn = (HttpURLConnection) url.openConnection();

            conn.setConnectTimeout(3000);

            

             int code = conn.getResponseCode();

             if (code == 200) {

                  InputStream in = conn.getInputStream();

                   return parseJSON(in);

            }

             throw new RuntimeException( "网络异常: " + code);

      }

      private List<Person> parseJSON(InputStream in) throws Exception {

            ByteArrayOutputStream out = new ByteArrayOutputStream();

             byte[] buffer = new byte[8192];

             int length;

             while ((length = in.read(buffer)) != -1)

                  out.write(buffer, 0, length);

            in.close();

            out.close();

            

            String json = new String(out.toByteArray());

            List<Person> list = new ArrayList<Person>();

            JSONArray arr = new JSONArray(json);                   // 把String封装成JSON数组

             for ( int i = 0; i < arr.length(); i++) {         // 遍历JSON数组

                  JSONObject obj = arr.getJSONObject(i);           // 获取每个JSON对象

                  Person p = new Person();                              

                  p.setId(obj.getInt( "id"));                             // 从JSON对象中获取"id"字段的值

                  p.setName(obj.getString( "name"));

                  p.setAge(obj.getInt( "age"));

                  list.add(p);

            }

             return list;

      }

}